メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.471782919549 40.6064579535481, 140.471255273424 40.6065443940884, 140.47127269494 40.6066600493259, 140.471128125672 40.6066843636007, 140.471047606411 40.6062190301554, 140.471719698654 40.6061302986087, 140.471782919549 40.6064579535481)) ^^http://www.opengis.net/ont/geosparql#wktLiteral